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The widespread use of internal combustion engines (ICE) requires continuous improvement of basic technical, economic and operational characteristics. Creating a competitive internal combustion engine involves the use of promising ways to improve the quality of control, the experimental development of the engine, the reduction of development time and the preparation of its serial production. In the process of developing the software of the automated test system (ATS) of the engine, one of the main tasks is to determine the mathematical model of the engine, which is necessary for setting the parameters of the ATS. Knowledge of the mathematical model of the internal combustion engine also provides the possibility of taking into account the dynamic properties of the engine when developing an automated test system. In addition, these equations can be used to control the operating modes of the internal combustion engine using a computer during bench tests.
Mathematical models are widely used in the design and development of microprocessor engine control systems, the development of methods for diagnosing its operation, and in solving a number of other problems . Important aspects of mathematical modeling of the engine are the ability to automate the search for optimal options and, ultimately, the use of mathematical models as a dynamic functional analogue of an object or its element when building an ATS . With the help of mathematical modeling, it is possible to analyze the course of individual working processes and the entire working cycle, to predict the main indicators and characteristics of the engine . At the same time, models cannot be fully adequate to an object and reflect only certain of its properties that are of interest for the purposes of a specific study . The implementation of mathematical models in the ATS program allows the system to operate in real time . The complexity of creating ATS engine software is related to the functioning of systems in real time and the presence of time constraints on the response and processing of various input signals and situations . As a result, the ATS engine software package must ensure that a sufficiently large variety of research, developmental and serial tests of numerous types and modifications of the internal combustion engine is carried out
A method has been developed for setting model parameters using graphic characteristics representing acceleration, constant deceleration moments in order to study various engine operating modes in real time, as well as the ability to analyze the influence of such factors as load, temperature, fuel composition affecting engine operation.
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